We have a job in Qlikview publisher that run on schedule every morning at 8am which loads master data from bw to qvd. Since we scheduled it for the first time it always finishes with errors and actually Master data not being loaded. When then we run it manually it finishes ok. You can find error message example on the first picture

The most common reason of this job failing was time out. So we thought that it is related to BW side, so may be jobs ran in time when system is overloaded or it had too low priority in BW, but that was not the case. As you can see on the second picture jobs finished successfully on BW side.

The publisher log is not very useful in this case. Turn on logfile generation in the Document Properties of the QVW and reload from Publisher. Then paste or attach the text version (not an image) of the document log here.